Not the grandparent, but it makes things a lot easier.
Basically, think of something as trivial as form validation. You need to do it both client and server-side regardless, but client side you might have additional complexity, like "if paying by credit card, show those fields, and if paying by PayPal, redirect." This means that your server might need to be aware of these branches of state that might happen, and it means complexity.
On the other hand, if you keep UI state to the UI layer on the client, the server side becomes super simple: you have an API that says something like "here are the shipping and billing details using a credit card. Charge it" or "shipping and billing details + PayPal token. Charge it." There is no "if we are rendering a PayPal processing error, re-render the entire state of the page, preserving all the checkboxes and showing the right bits of the DOM." It's just pure business logic.
Something like Vue is also much better geared at doing a UI than a server-side rendered template. It's dynamic by nature, and directly affects the DOM. The state is kept in such a way that it pertains to the UI. If you are processing something like a request to /orders?filter=recent&order=amount&page=3, you have to re-parse the state from the URL and then get the results every time. Vue/VueX will keep the state in a convenient fashion and the URL can be instructed to reflect it. No need to write custom code to interpret it.
Simple CRUD stuff is super easy with Vue + VueX + Bootstrap + Django. That's been my stack and I like it. Complicated stuff if much faster to develop using this than to try to use something like Django templates + jQuery.